... stone: about 93% quartz powder, 7% other additives such as resin, mineral pigment, sea shell, detritus etc. 2. Our most sell ... lower cost. 2)- We not only produce quartz stone slabs & tiles, but also provides processing of quartz countertops, kitchen tops, vanity ... tops, cut-to-side quartz tiles and prefab quartz sinks etc.. 3)- Xiamen Enrich provides free ...